
Decidim
Prioneer.io
Loomio
Consul
Jina Rationale
Typeform
Polis
Online voting system (german & english) for Interactive Democracy, which is used by the Pirate...

ZIP Code API
ZipCheckup
PostalCodes.info
Smarty
Geocode.xyz
Geoco.io
getAddress.io
Free Zip Code API - Free Postal Code Validation | Zipcodestack

Which is more popular?
LiquidFeedback might be a bit more popular than Zipcodestack. We know about 4 links to it since March 2021 and only 3 links to Zipcodestack.
Website, pricing, platforms and company facts side by side.
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| Website | liquidfeedback.com | zipcodestack.com |
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Recommendations tracked on public social media and blogs since March 2021.


An implementation of Liquid Democracy is Liquid Feedback, which the Pirate Party Germany uses Internally. Source: almost 4 years ago
There is also Liquid Feedback though I've never seen a live demonstration. Source: almost 5 years ago
Not yet but I'm hopeful about ideas like liquid democracy https://liquidfeedback.com/en/. - Source: Hacker News / about 5 years ago
Using the zipcodestack API in your Node.js application is straightforward. You’ll first need to sign up for a free API key (it only takes a minute). Once you have your API key, you can call the REST endpoints using any HTTP client. Below... - Source: dev.to / about 1 year ago
Zipcodestack - Free Zip Code API and Postal Code Validation. Ten thousand free requests/month. - Source: dev.to / over 2 years ago
I have seen this request pop up quite a few times. I did a quick search for free APIs of zipcode lookups. This one, named "zipcodestack" (I'm not in any way tied to, endorsing, or promoting them) seemed like a pretty good resource with... Source: over 3 years ago
When comparing LiquidFeedback and Zipcodestack, you can also consider the following products.

Free Open-Source participatory democracy for cities and organizations
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REST API for US ZIP, ZIP+4, and Canadian postal codes. Single unified endpoint covers address validation and standardization, radius search (centroid haversine and true spatial polygon intersection), point-to-point distance, autocomplete/typeah
Compare ZIP Code API to LiquidFeedback or Zipcodestack:

Prioneer is a stack ranking tool. Get people's priorities · Research customer pain points · Make team decisions · Create beautiful ranking surveys in 1 minute!
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Check water quality, product recalls, energy rebates, and safety alerts for any U.S. ZIP code. Free reports powered by EPA and government data.
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Loomio helps groups of people make decisions together, online.
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Postal code lookup API and downloadable country datasets for address validation, checkout, logistics and geocoding workflows.
Compare PostalCodes.info to LiquidFeedback or Zipcodestack: